Boiler for steam and hot-water heating.



J. W. PIPER.

BILER FOR STEAM AND HOT WATER HEATING. APPLICATION FILED AUGAO. |916.

WITNESS:

'By mm,

ATTORNEY.

Patented Apr. 9,1918.

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Beinen FOR'STEAM AND Horiwn'rnn HEATING;

Specification of Letters Patent.

Patented Apes, 191s.

Application filed August 1o, 1916.v `serial No. 114,285.

To all whom t may concern.'

Be it known that I, JOSEPH W. PIPER, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented a certain new and useful Improvement in Boilers for Steam and Hot-l/Vater Heating, of which the following is a specification.

This invention relates to boilers for steam and hot water heating.

The object of the invention is to increase the heating surface of the boiler by the use of a water-column in the fire-chamber, the same being connected laterally to the water space of the body o-f the boiler bywater tubes and terminating at the top in the uppermost water section, said column being closed at the bottom and extending down into the bed of the fuel into proximity to the fuel supporting grate.

Opposite sides of the water-column are connected by water tubes arranged in vertical planes to the body of the boiler, these tubes being arranged in such proximity to each other as to prevent any considerable portion of the fuel from passing between them, without preventing a su'icient draft.

This arrangement of water column and lateral connections serves as a wall to divide the fuel containing part of the fire-chamber into two separate furnaces, only one of which need be used in mild weather as the boiler is provided with door-openings on opposite sides of the wall formed by the watertubes so that fuel may be supplied on either I or both sides of the wall.

By this construction a considerable portion of the water is always subjected to the greatest heat of the re, thereby effecting a great saving of fuel and promoting the circulation of the water and generation of the steam.

In the accompanying drawing Figure 1 is a horizontal section on the line 1 1 in Fig. 2, of a boiler provided with my improvement.

Fig. 2 is a general vertical central section on line 2 2 in Fig. 1.

Fig. 3 is a vertical central section on line 3 3 in Fig. 1.

A indicates the base; a the grate section; B the grate housing; c the grate-bars; C the draft door; C1 the draft-rlng; D the body of the boiler; l the fire-chamber; d1 d1 the door openings; d2 the water space between the outer and inner shells of the boiler; Z3 the Hue section; D1 the upper water section or dome; E the smoke-box; G G risers or steam outlets; H H the water returns; these parts being of well known construction except as hereinafter statedand the grate being substantially as shown in U. S. Patent No. 774,397 granted November 8, 1904 to me.

F indicates the water`column, the same being a vertical tube arranged' in the center of the fire-chamber and extending from the top of the body of the boiler downward nearly to the grate and having a closed lower end, its upper end opening into the water space d2 at the top of the body of the boiler.

The water column is connected laterally to the water space cl2 by tubes f which are arranged on opposite sides of said column in the same vertical plane, said tubes being arranged in such proximity to each other as to interfere with fuel passing between said tubes while permitting a draft between them.

The boiler is provided with doors opening on opposite sides of the wall formed by the water tubes so that `the boiler may be supplied, on either or both sides of said wall, with fuel.

I claim as my invention:

1. A boiler having a central water-column pendant from the top of the fire-chamber and extending downward into proximity to the fuel-supporting surface and having tubular lateral connections with the body of the boiler, the lower end of said column being far enough above said surface to allow the bed of fuel to extend under said column and connections.

2. A boiler having a central water column pendant from the top of the re-chamber and extending downward into proximity to the fuelsupporting surface and having tubular lateral connections at its lower portion with the body of the boiler, the lower end of said column being far enough above said surface to alldw the bed of fuel to extend under said column and connections.

3. A boiler having a central water column pendant from the top of the re-chamber and extending downward into proximity to the fuel-supporting surface and having tubular lateral connections with the body of said boiler, said connections being arranged in vertical planes at intervals and dividing provided with feed doors on opposite sides said fire-chamber. of said lateral connections. l0 4f. A boiler having a central watei1 column In Witness whereof, I have affixed my pendant from the top of the {ire-chamber signature in presence of two witnesses.

5 and extending downward into proximity to JOSEPH W. PPER.

the fuel-supporting surface and having tu- Witnesses: bular lateral connections with the body of Y ALBERT M. MOORE, said boiler dividing said fire-chamber and WILLIAM F. CURTIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

` Washington, D. C. 

